The last couple of days I've been trying to setup a Travis-CI build for my bash scripting project. I am having a problem with sticking an alias into the .bashrc that lives in the Travis build and not sourcing.
Below is my simple example of creating a bash alias in the .bashrc file on Linux, and the attempt failing.
Travis-CI (.travis.yaml):
language: bash
git:
quiet: true
submodules: false
matrix:
include:
- os: linux
dist: xenial
script:
- sh test_bash.sh || travis_terminate 1;
- bash test_sourcing.sh || travis_terminate 1;
test_bash.sh:
current_shell=$(echo $SHELL)
if [ "$current_shell" != "/bin/bash" ]; then
echo "The current build is not working with the Bash Shell."
exit 1
fi
test_sourcing.sh
alias name='echo "John Doe"' >> $HOME/.bashrc
source $HOME/.bashrc
output=$(name)
if [ "$output" != "John Doe" ]; then
echo "Sourcing is not working for some reason."
exit 1
fi
What I get from the output of my build is the following:
$ bash -c 'echo $BASH_VERSION'
3.2.57(1)-release
0.02s$ sh test_bash.sh || travis_terminate 1;
The command "sh test_bash.sh || travis_terminate 1;" exited with 0.
$ bash test_sourcing.sh || travis_terminate 1;
test_sourcing.sh: line 3: name: command not found
Sourcing is not working for some reason.
I expected to get all tests to pass but I am having a hard time understanding such a simple feature. The only thing I can think of is that the version of BASH is at a version that alias is not supported. Thanks for any help!
you could work with simple variables or execute them through eval
, which is simlar to what you want.
Look for name2
and the two options with and without eval
. name1
is your code.
$ cat test_sourcing.sh
set -x
alias name1='echo "John Doe"' >> $HOME/.bashrc
name2='echo "John Doe"' >> $HOME/.bashrc
source $HOME/.bashrc
output=$($name1)
output=$($name2)
output=$(eval $name2)
if [ "$output" != "John Doe" ]; then
echo "Sourcing is not working for some reason."
exit 1
fi
when running the script you can see:
$ ./test_sourcing.sh
++ alias 'name1=echo "John Doe"'
++ name2='echo "John Doe"'
++ source /home/schroen/.bashrc
+++ case $- in
+++ return
++ output=
+++ echo '"John' 'Doe"'
++ output='"John Doe"'
+++ eval echo '"John' 'Doe"'
++++ echo 'John Doe'
++ output='John Doe'
++ '[' 'John Doe' '!=' 'John Doe' ']'
"
inside the variable value) eval
which runs the echo. Sometimes this is important when building variablenames with other variable. this eval
thing...
$ cat variable-loop.sh
#!/usr/bin/env bash
#set -x
dev1=foo
dev2=bar
dev3=foobar
echo 'without eval not what we want...'
for i in $(seq 1 3); do
echo dev$i
echo $dev$i
done
echo 'with eval it is working...'
for i in $(seq 1 3); do
eval echo \$dev$i
done
$ ./variable-loop.sh
without eval not what we want...
dev1
1
dev2
2
dev3
3
with eval it is working...
foo
bar
foobar
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